Home
Class 12
BIOLOGY
Assertion : Hydrophily constitues a majo...

Assertion : Hydrophily constitues a major mode of pollination in most of the aquatic angiospermous plants.
Reason : Almost all the aquatic dicot and monocot plants require water for the transport of male gametes and for fertilisation.

A

If both assertion and reason are true and reason is the correct explanation of assertion

B

If both assertion and reason are true but reason is not the correct explanation of assertion

C

If assertion is true but reason is false

D

If both assertion and reason are false

Text Solution

Verified by Experts

The correct Answer is:
d

Hydrophily is the made of pollination (transfer of pollen grains from the mature anther of a flower to the stigma of another flower) which is accomplished through the agency of water. Pollination by water is quite rare in flowering plants and is limited to only about 30 genera, mostly monocotyledons e.g. Vallisneria, Zostera, Ceratophyllum, etc. in may aquatic plants with emergent flowers, pollination occurs by wind or insects, e.g., lotus , water lily, water hyacinth, etc.
Promotional Banner

Topper's Solved these Questions

  • REPRODUCTIVE HEALTH

    NCERT FINGERTIPS|Exercise Reproductive Health|133 Videos
  • STRATEGIES FOR ENHANCEMENT IN FOOD PRODUCTION

    NCERT FINGERTIPS|Exercise Strategies For Enhancement In Food Production|151 Videos

Similar Questions

Explore conceptually related problems

Assertion : The distribution of bryophytes and pteridophytes is limited. Reason : In bryophytes and pteridophytes water is required for the transport of male gamete and fertilisation.

Assertion :- It is believed particularly for some bryophytes and pteridophytes that their distribution is limited. Reason :- They need water for transport of male gametes and fertilisation

Assertion :- All aquatic plants use water for pollination. Reason :- In aquatic habitat water is the only medium for transfer of gametes

An aquatic plant which is pollinated by water is

Assertion :- Mostly aquatic animals are ammonotelic. Reason :- Ammonia is the most toxic form and requires large amount of water for its elimination.

Assertion: Calophyllum leaf has parallel venation. Reason: It is the plant of dicot group of angiosperms.

Assertion : Aquatic plants contain aerenchyma. Reason : Aerenchyma keeps aquatic plants affloat .

Assertion :- Polygonum type of embryosac, is most common in angiosperm. Reason :- lt is found in most of Angiosperm plants

Assertion : In floating aquatic plants, roots caps are absent Reason : Root pockets are present in aquatic plants.

How many meiotic divisions are required to produce 104 male gametes in a typical Angiospermic plant ?

NCERT FINGERTIPS-SEXUAL REPRODUCTION IN FLOWERING PLANTS-Sexual Reproduction In Flowering Plants
  1. While planning for an articifical hybridisation programmme involving d...

    Text Solution

    |

  2. In the embryos of a typical dicot and a grass, true homologous structu...

    Text Solution

    |

  3. The phenomenon observed in some plants wherein parts of the sexual ap...

    Text Solution

    |

  4. In a flower, if the megaspore mother cell forms magaspores without und...

    Text Solution

    |

  5. The phenomenon wherein, the ovary develops into a fruit without fertil...

    Text Solution

    |

  6. Assertion : An angiospermous flower represents the modified condensed ...

    Text Solution

    |

  7. Assertion : A typical microsporangium of angiosperms is generally surr...

    Text Solution

    |

  8. Assertion : In a microsporangium, the tapetal cells possess tittle cyt...

    Text Solution

    |

  9. Assertion : In most angiosperms, microspores of a tetrad grow and sepa...

    Text Solution

    |

  10. Assertion : Exine of a pollen grain is made up of sporopollenin which ...

    Text Solution

    |

  11. Assertion : The method of development of embryo sac from a single func...

    Text Solution

    |

  12. Assertion : Although geitonogamy is functionally crosspollination invo...

    Text Solution

    |

  13. Assertion : Hydrophily constitues a major mode of pollination in most ...

    Text Solution

    |

  14. Assertion : Only the pre-pollination growth of male gametophyte occurs...

    Text Solution

    |

  15. Assertion : Self-incompatibility is a genetic mechanism which prevents...

    Text Solution

    |

  16. Assertion : In angiosperms, endosperm development precedes embryo deve...

    Text Solution

    |

  17. Assertion : In Cocos nucifera coconut water represents the cellular en...

    Text Solution

    |

  18. Assertion : During embryo development in dicots, suspensor serves as t...

    Text Solution

    |

  19. Assertion : Ex-albuminous seeds do not possess any residual endosperm,...

    Text Solution

    |

  20. Assertion : In plants, apomixis is a form of asexual reporduction that...

    Text Solution

    |